Convert AVI to MP4
Free online AVI to MP4 converter — no signup, no watermark
Convert AVI (Audio Video Interleave) files to MP4 (MPEG-4 Part 14) format online for free. Our AVI to MP4 converter runs entirely in your browser — just drag in your file, click convert, and download the result. No software to install, no account required, and your files stay private.
How to convert AVI to MP4 in 4 steps
- 1
Upload your AVI file
Drag and drop your AVI file into the converter, or click to browse from your device. We support files up to 2GB.
- 2
Choose MP4 as the output format
MP4 is pre-selected. Optionally adjust quality, resolution or bitrate if your file needs custom settings.
- 3
Convert AVI to MP4
Click the convert button. Our converter processes your AVI file and produces a high-quality MP4 output, usually in under a minute.
- 4
Download your MP4 file
Once conversion is complete, download your MP4 file. Your original AVI stays untouched and we delete uploaded files within an hour.
Why convert AVI to MP4?
AVI is a legacy Microsoft container format that preserves high video quality with minimal compression. It remains popular for archival and Windows-based workflows where compatibility with older software matters. MP4 is the most widely supported video container format, offering excellent compression with H.264 or H.265 codecs while preserving quality. It works on virtually every device, browser, and platform. Converting from AVI to MP4 is useful when you need streaming to youtube, vimeo and social media or want to take advantage of universal device and browser support.
Top reasons to switch to MP4
- Streaming to YouTube, Vimeo and social media
- Playback on smartphones and smart TVs
- Sharing video files online
- HTML5 web video embedding
AVI vs MP4: side-by-side
AVI
Pros
- + High video quality
- + Wide Windows compatibility
- + Simple structure
Cons
- − Very large file sizes
- − Poor support on modern mobile devices
- − No native streaming support
MP4
Pros
- + Universal device and browser support
- + Excellent compression-to-quality ratio
- + Small file sizes
- + Supports subtitles and metadata
Cons
- − Lossy compression by default
- − Can require licensing for some codecs
AVI to MP4 — Frequently Asked Questions
Is converting AVI to MP4 free?
Is converting AVI to MP4 free?
Yes, our AVI to MP4 converter is 100% free. There are no hidden fees, no signups required, and no watermarks added to your converted MP4 files.
Will I lose quality converting AVI to MP4?
Will I lose quality converting AVI to MP4?
Our converter uses high-quality encoding settings to preserve as much of the original AVI quality as possible in the MP4 output. For lossless results, choose the "high quality" preset.
How long does AVI to MP4 conversion take?
How long does AVI to MP4 conversion take?
Most AVI files convert to MP4 in 30 seconds to a few minutes, depending on the file size, duration, and your internet connection. Larger files take longer.
Is it safe to upload my AVI file?
Is it safe to upload my AVI file?
Yes. All uploads use encrypted HTTPS connections, files are processed on isolated servers, and converted MP4 files are automatically deleted within one hour of conversion.
Can I convert AVI to MP4 on mobile?
Can I convert AVI to MP4 on mobile?
Absolutely. Our AVI to MP4 converter works in any modern browser on iPhone, Android, iPad, Windows, macOS and Linux — no app install required.
What's the maximum file size for AVI to MP4?
What's the maximum file size for AVI to MP4?
You can convert AVI files up to 2GB to MP4 for free. For larger files, contact us about our batch and premium options.
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